Nozzle for ladles used in pouring molten metal



' 1,635,839 July 1927' J. K. HASSALL ET AL I NOZZLE FOR LADLES USED IN POURING MOLTEN METAL Filed June 11, 1926 Patented July 12, 1927. 1,635,839

UNITED STATES PATENT OFFICE.

JOHN KNOWLES HASSAIJL OF ROTHERWOOD, NEAR ASHBY-DE-LA-ZOUCH, AND

' ANDREW HARRIS, F WOODVILLE, ENGILAND.

NOZZLE FOR LADLES USED IN POURING MOLTEN METAL.

Application filed June 11, 1926, Serial No. 115,167, and in Great Britain June 11, 1925.

This invention relates to the nozzles of tained, but the magnesite may be in any poladles used in pouring molten met-a1, more sition other than the centre, as set forth in especially steel, into ingot or other moulds. our said rior patent, provided that the These nozzles have heretofore generally outlet is oFfireclay. a

been formed of fireclay, rock ganister, or a The drawing which formsia part ofthis' mixture of similar minerals, moulded and specification is a section through a nozzle backed in a kiln, which type is open to the constructed according to our invention.

objection of erosion of the bore hole; or, In carrying our said'invention into efiiect they have been formed of graphite or magwe provide the upper or inlet portion wit-h neslte andobjections to the latter are that a magnesite liner 0, surrounded by fireclay on account of its being such a rapid con- 6, or alternatively the upper portion may be ductor of heat shankers (similar to icicles) constructed wholly of magnesite; further form upon the lower edges of the nozzle the magnesite portion may extend any diswhere it protrudes from the ladle bottom, tance down and internally of the nozzle and from the same cause and the unwearable be of any thickness or varying. thicknesses bore of the magnesitenozzle it is diflicult that may be desired; it may be of wedgeto preserve an even pouring speed especially shape or stepped form as shown in dotted when the ladle is nearly empty owing to the lines, or more than one magnesite liner or steel or the like having cooled somewhat by block may be employed, with fireclay in bethat time and become less fluid and owing tween said magnesite portions.

also to the absence of pressure on the nozzle In all cases however we construct the which would exist, for instance, when the lower or outlet portion of the nozzle of fireladle'contained 50 or 60 tons of metal; a clay or some other analogous material to nozzle has also been made with the object of remove the disadvantages hereinbefore set combining the best features of the fireclay forth.

and magnesite nozzles by forming the upper Having now described our invention, what part of fireclay and the lower or outlet of we claim as new and desire to secure by Letmagnesite, this does not however successters Patent is i fully meet all difficulties as the varyin size 1. In a foundry ladle, a nozzle composed of bore of the two parts of the nozz e inof fireclay and a magnesite, the outlet por- (luces rather a spattering form of stream, tion of the nozzle-being constructed of fireand the shanker trouble still remains. clay and the inleteportion thereof being con- Our invention is designed to more effec; structed of magnesite. I

tually overcome the foregoing difliculties' 2. A nozzle for'foundry ladles, as claimed and relates to an improvement in or modiin claim 1, in which the same is composed of fication of the invention of our prior British fireclay with a magnesite liner at the inlet-- Patent No. 224,113, in which the upper and portion thereof. lower portions are of fireclay or the like In testimony whereof we aflix our signaand the central portion is of magnesite. tures. 40 In our present invention the combination JOHN KNOWLES HASSALL.

of fireclay or the like and magnesite ISTF-w ANDREW HARRIS. v 

